A persistent memory linked list application written using PMDK library

list.c

#include <ex_common.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "pmemobj_list.h"

POBJ_LAYOUT_BEGIN(list);
POBJ_LAYOUT_ROOT(list, struct root);
POBJ_LAYOUT_TOID(list, struct entry);
POBJ_LAYOUT_END(list);

static PMEMobjpool *pop;

void addNode(void);
void printNodes(void);

// The root object that stores pointers to the elements in the linked list
struct root {
    TOID(struct entry) head;
    TOID(struct entry) tail;
};

// Structure of each node in the linked list
struct entry {
    int id;
    TOID(struct entry) next;
};

void addNode() {
    TOID(struct root) r = POBJ_ROOT(pop, struct root);
    TOID(struct entry) e;

    struct root *rp = D_RW(r);
    struct entry *tp = D_RW(rp->tail);

    TX_BEGIN(pop) {
        e = TX_NEW(struct entry);
        TX_ADD_DIRECT(rp);
        D_RW(e)->id = rand();
        D_RW(e)->next = TOID_NULL(struct entry);
        if(TOID_IS_NULL(rp->head)) {
            rp->head = e;
        } else {
            TX_ADD_DIRECT(&tp->next);
            tp->next = e;
        }
        rp->tail = e;
    } TX_ONABORT {
        abort();
    } TX_END
}

void printNodes() {
    TOID(struct root) r = POBJ_ROOT(pop, struct root);
    TOID(struct entry) e = D_RO(r)->head;

    while(!TOID_IS_NULL(e)) {
        printf("ID = %d\n", D_RO(e)->id);
        e = D_RO(e)->next;
    }
}

int main() {

    const char *path = "/mnt/ext4-pmem0/fifo";

    if (file_exists(path) != 0) {
        if ((pop = pmemobj_create(path, POBJ_LAYOUT_NAME(list),
                    PMEMOBJ_MIN_POOL, 0666)) == NULL) {
            perror("failed to create pool\n");
            return -1;
        }
    } else {
        if ((pop = pmemobj_open(path,
                    POBJ_LAYOUT_NAME(list))) == NULL) {
                perror("failed to open pool\n");
                return -1;
        }
    }

    addNode();
    printNodes();

    return 0;
}